Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05d1acdd3ae6144…

MALICIOUS

PDF

45.1 KB Created: 2020-08-03 23:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb8a4d4ec6ab6aa8f9ce6fcad244b734 SHA-1: 6ce1cc48721b74f0fe88f94766d85d84768a2fae SHA-256: e05d1acdd3ae6144803f4656330d5fbd5177de94bae1365cca47baba9075cc57
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.com, which is designed to lure users with a search query for 'ball bearing sizes chart pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious payload. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=ball+bearing+sizes+chart+pdf
    • http://files.littlelanedaycare.com/uploads/1/3/0/8/130814605/3989805.pdf
    • http://tomefa.erichhunter.com/uploads/1/3/2/6/132695384/9705606.pdf
    • http://files.connectingcommunities.com.au/uploads/1/3/1/3/131380354/kimom-xubamozagi-xerebomejuril.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/58236373667.pdf
    • https://cdn.shopify.com/s/files/1/0435/0925/2250/files/pazigogugiruriperinike.pdf
    • https://cdn.shopify.com/s/files/1/0430/8959/2473/files/wereruves.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/bevikarakakudupiwudujomi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/40789377717.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/96075516931.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/wekitonizomudusojunogete.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/armello_explode_pool.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/sasatevuwame.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/lolesolemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/bezuzodil.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/6094525784.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_off00007214.bin
cc7d451ab89db4f1327f7ed35c1b7485bb461c0a3adc8216c6779f6f9323f9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7214 5656 bytes
font_01_sfnt_off0000854e.bin
8bac85b992899244bce05cf93cae29f5a1c2336b62ad5a4a752720f13f684d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854E 9932 bytes

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