Malicious PDF — malware analysis report

Static analysis result for SHA-256 410948a9192bd566…

MALICIOUS

PDF

44.2 KB Created: 2020-08-21 05:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2700858bc6429d4b1c96dbc235994cdf SHA-1: b727b2cf4952c02a8494b1958e806b3111c36ac2 SHA-256: 410948a9192bd5662030cb9d652ab27a0896f226f4e6483aa7be139792f7ce63
154 Risk Score

Malware Insights

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

The PDF contains a lure for "Yahoo email for android" and embeds a link to a known malicious redirector, ttraff.com. This redirector likely leads to further malicious content or phishing pages. The PDF also contains a large number of embedded links to other PDFs hosted on Shopify, suggesting a link farm designed to obscure the ultimate destination or to spread malicious content across multiple domains. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=yahoo+email++for+android
    • http://files.greenmantheatre.org/uploads/1/3/1/3/131398292/f32837947d0329.pdf
    • http://befasuva.sngprinting.com/uploads/1/3/2/8/132814975/0ab8d8.pdf
    • http://bixokasok.royaljudaica.com/uploads/1/3/1/3/131380284/kapidazego.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/jetadefeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/pros_and_cons_of_genetically_modified_foods.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/92638221367.pdf
    • https://cdn.shopify.com/s/files/1/0433/3004/4062/files/vanuwiruvapokofinavudik.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/lujuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/falozebosuxeviri.pdf
    • https://cdn.shopify.com/s/files/1/0446/2706/7043/files/ffxiv_garo_mount_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/41249344307.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/weeks_ina_year.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/katuxuzakumetusunizos.pdf
    • https://cdn.shopify.com/s/files/1/0428/7057/1174/files/bopawawiveloz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/56134019954.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_off00006441.bin
1bfe6ea0443cb2ef0e026dd628e86b205d51345b7ebde3f3656bf9a17524c111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6441 4640 bytes
font_01_sfnt_off000073c8.bin
95bc810fa30bc0bb33e0aca7f27bff3a38640543541927bf944a0d08ed0caa29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 9860 bytes
font_02_sfnt_off00009598.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9598 4324 bytes

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