Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd95f5dfd2ab2fd6…

MALICIOUS

PDF

59.6 KB Created: 2020-08-10 22:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e3678d86e9d574822b1fd5bafc237a SHA-1: 7a8830bccae4db0a7c4bbe6c934043a64ffa9d96 SHA-256: cd95f5dfd2ab2fd6d6c464fff7e08082371d27e97aec4d0a35c4717aa60f0f68
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.cc. The document body also contains this URL, along with a large number of other PDF links hosted on Shopify, suggesting a link farm for SEO poisoning. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click the malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=arbitrary+waveform+generator+block+diagram+pdf
    • http://files.custercadet.com/uploads/1/3/1/4/131453401/diwixodam-pexakesazipubi.pdf
    • http://files.rrboxerrescue.org/uploads/1/3/1/3/131379781/majizogunavapusimape.pdf
    • http://files.sharonjoys.com/uploads/1/3/0/9/130969592/4529718.pdf
    • http://files.jnhospitalityentertainment.com.au/uploads/1/3/2/6/132681482/lomijepadetonixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/vepajugelawotodozemo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5172/7513/files/34032022169.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/juwusabovisurowevateneg.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/wifabibejerowoxovaliluwev.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8671/files/91633743047.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3529/files/sumidovobivagodob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/xuvagaroko.pdf
    • https://cdn.shopify.com/s/files/1/0436/8387/2921/files/xerugutigobamakifizizisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/how_to_format_macbook_pro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/55711919340.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/rain_bird_sprinkler_system_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/kuronutotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/69297582236.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_off00009bff.bin
a7a9787114c29f17ded696138d9465f3b9e42f9942136ad01f0d357e97f3cfe7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFF 5532 bytes
font_01_sfnt_off0000aecf.bin
734dea2b4c571e7a1702d92ac1eaf75390d880cdbe1b01b429185fd71befd682
pdf-font-stream PDF embedded font (sfnt) at offset 0xAECF 10420 bytes
font_02_sfnt_off0000d27e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 4324 bytes