Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf09f11f8bea181f…

MALICIOUS

PDF

57.3 KB Created: 2020-08-13 02:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ed51ce042f10b52416940d8a72c4645 SHA-1: b7007d548d605fd70754f1d8476691bb88890aa3 SHA-256: bf09f11f8bea181f5a455a770d39a25b336df7f113916c2052cafff4368ed430
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', suggesting the document is designed to lure users to malicious infrastructure. The presence of numerous PDF links, many hosted on Shopify, further supports the SEO link farm tactic. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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.ru/wb?keyword=compound%20and%20complex%20sentences%20worksheet%20pdf%20with%20answers
    • http://files.katrinarecoveryquilts.org/uploads/1/3/1/6/131636947/8954810.pdf
    • http://files.kinglinecbd.com/uploads/1/3/1/8/131871817/sapezek.pdf
    • http://files.strawberryflats.com/uploads/1/3/2/8/132815054/3857123.pdf
    • http://somenumeg.martapequeno.com/uploads/1/3/1/4/131453674/4fd9442f61c7f.pdf
    • http://files.patpetdingdongbelle.com/uploads/1/3/0/7/130776490/2eb8d6.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/agneau_de_dieu_pain_partag.pdf
    • https://cdn.shopify.com/s/files/1/0437/8158/7093/files/2534402806.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/81372664888.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/3312265308.pdf
    • https://cdn.shopify.com/s/files/1/0431/8861/7378/files/9434359495.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/river_song_timeline.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/colorado_common_grant.pdf
    • https://cdn.shopify.com/s/files/1/0439/5309/4811/files/wosifisulaxidu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0304/1176/files/rabbit_farming_business_plan_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/veda_mantras_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/penevifuxaluvumevapota.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/lixefefebibisaranawej.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/17059564634.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000881b.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x881B 2828 bytes
font_01_sfnt_off00009215.bin
4ad335636e1d19c9e553f486094637ca6f51ae7bc5bd8a0b3f61582cc2a94762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 5524 bytes
font_02_sfnt_off0000a4c4.bin
4b06bec6803e59a3772e0685ec3be652a6089f67e4956dfaf0c57659a340abaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C4 9940 bytes
font_03_sfnt_off0000c6b8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 4324 bytes

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