Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae5546a3bc92e86…

MALICIOUS

PDF

52.6 KB Created: 2020-08-22 04:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16e15b860ea543c5efd772a3c3e6fab6 SHA-1: 72c38766ad29a15b9aa88f73e18045c3e546bc90 SHA-256: 3ae5546a3bc92e862e5aadb3167c4e63e221756e3dc525ee08a7bccd7b349b75
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body and embedded annotations reveal a large number of external links, many pointing to Shopify domains, but one specific URL, https://ttraff.ru/pify?keyword=rpg+maker+vx+ace, is identified as a malicious redirector. This suggests the primary function of the PDF is to lure users into clicking malicious links, likely for phishing or malware distribution.

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/pify?keyword=rpg+maker+vx+ace
    • http://files.sh-equestrian.com/uploads/1/3/1/4/131406744/dfbe2ba186676.pdf
    • http://files.mycorbu.com/uploads/1/3/2/6/132696598/noven.pdf
    • http://fevupataf.rastay4change.com/uploads/1/3/1/4/131453133/vigofip-getojugesasufin-rewidalupes-jikanud.pdf
    • http://xoxuxagim.humanistcelebrantscotland.org/uploads/1/3/0/8/130813478/nikeruxuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/arduino_led_projects.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/adverbs_of_time_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0436/6663/6953/files/83479074873.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/funepuvakepego.pdf
    • https://cdn.shopify.com/s/files/1/0432/6844/0232/files/audio_video_song_kaise_kare.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/dabelazuwiwalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/apostrophe_s_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8791/files/hoja_de_seguridad_anilina.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/27224590003.pdf
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/tupapotomilim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715e.bin
6db71473222c44ad0039e19a914467384439ec8d6b3c33eca2a66fa32d7bb227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 6768 bytes
font_01_sfnt_off00008847.bin
d291f6b1ae535b95c1936f5fe67d90a7f334aa72eb0ace171b886c1aed7cfece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8847 5240 bytes
font_02_sfnt_off00009a19.bin
73043a357e890418525d75ceedbad6e8d4521dd0c6ece84b4b6f440fd9c86462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A19 13620 bytes

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