Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb7050ac84a25d1…

MALICIOUS

PDF

38.5 KB Created: 2020-08-12 19:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3740fe966a56513953d12276779c871 SHA-1: 2355c47d201598d16e140f2ba99326cf90ba39e4 SHA-256: 4fb7050ac84a25d1fc9b340fbb96a9f376c952375024de679dfe7493bb5e04b6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though partially corrupted, contains the malicious URL and references to PDF downloads, reinforcing the attack pattern. No scripts were extracted from this sample.

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/wb?keyword=comparative%20politics%20books%20pdf
    • http://files.mcleanboosters.org/uploads/1/3/0/8/130813821/legibesinanexe.pdf
    • http://vumov.4lifecapital.com/uploads/1/3/1/4/131453574/3535761.pdf
    • http://files.riccivineyards.com/uploads/1/3/1/4/131407233/xovob-mazowemenum-gakokujid-gudetixifelow.pdf
    • http://xefaxude.mobilemusicphilly.com/uploads/1/3/1/3/131380600/jitun_tutikumugezomo_solutage.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/array_of_objects_java.pdf
    • https://cdn.shopify.com/s/files/1/0440/2708/4965/files/gotulofiwazufibul.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/tatikudulezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/welesepomobavijewilaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/8634/8450/files/rikixugosanexudusaxase.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/understanding_pathophysiology_5th_edition_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0436/8960/7321/files/fixisuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5313/files/18981426659.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/fasofepoderowunetixalivuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/gitignore_node_modules_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45287622464.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055fa.bin
d2851434a2391cac70af6e773dcde4b2d6231470db7f8ed4f2dcf7506f38822b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FA 5468 bytes
font_01_sfnt_off0000687a.bin
089954180d0b6158c67ddba4ba9cd347b806da32f85289f0b2788c51bdf76cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687A 10296 bytes

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