Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba39f6a0ab3414d5…

MALICIOUS

PDF

45.9 KB Created: 2020-10-25 07:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c4a13bcb4f511bc53b7382645862479a SHA-1: d643f14842697a4f9f497fb0e7532714c0f3e023 SHA-256: ba39f6a0ab3414d55a8f70b54ce005e7abf01dd0f843ad0ed37f76b986482a33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, https://ttraff.ru/123?keyword=spascriptions+gel+face+mask+3+pack+instructions, is flagged as a malicious redirector. The document body also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links, many pointing to strikinglycdn.com, indicates a potential link farm or SEO manipulation tactic. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/123?keyword=spascriptions+gel+face+mask+3+pack+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f88c9491a2d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5f94c5086b688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f8a632533432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8c47fb664f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6cd2c7c5-4a8e-4ab0-aa4a-3d5d7c140db1/53151263655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7541be34-f2ee-4333-ba38-032cba6ab3c1/runescape_shattered_worlds_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d03317e-a7e7-4fb9-859f-63b3a121a432/52202181638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b7eba2-45c2-41a1-9498-23e365581eed/velalifefugivudifunuwin.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/56074087471.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/aashto_roadside_design_guide_2002.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/dejamologabesa.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jefofavelagulosa.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/mla_citation_style_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/surah_al_kahf_english_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/b._ed_syllabus_2019-_20.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/batikikarokorixuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9747/1173/files/47085014953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/gatorade_whey_protein_powder_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5155/6260/files/31398601577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5067/1514/files/kusd_staff_connect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8873/0054/files/download_android_emulator_leapdroid.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5548 bytes
SHA-256: 9b69d29984381613a6aacfcbc33f33affc61adb8ffdb117ae63c7934bde3b842
font_01_sfnt_off00007857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 10256 bytes
SHA-256: 2cdf322402ae2c99378f9ead536f7d0c74e8dccb3e4117ab16a605e5964782ab
font_02_sfnt_off00009b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B75 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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