Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a88a3618da680fb…

MALICIOUS

PDF

56.2 KB Created: 2020-08-04 09:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aa8c47798b9206847739ef11a8748fe SHA-1: 7e2acdaee50c53b80e522d465deb987323d383d8 SHA-256: 8a88a3618da680fb0b1adcde2990ea540c23841104fa0cd83a7f5159654fc455
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is used in conjunction with a lure related to 'b. sc mathematics books pdf'. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is designed to lead users to a potentially harmful destination.

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/pify?keyword=b.+sc+mathematics+books+pdf
    • http://files.pghdawgs.com/uploads/1/3/1/4/131406537/lugipenebifu.pdf
    • http://files.tnshockey.com/uploads/1/3/2/6/132695273/lijugununedu-vugelekopimige.pdf
    • http://files.japanimenetwork.com/uploads/1/3/0/7/130776120/214069.pdf
    • http://files.roxannaalbayati.com/uploads/1/3/1/4/131483209/metowonamev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/diwefofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/70144546780.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/21152213559.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/27618459915.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/patoxada.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/39519507618.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/wotidufaxatutukav.pdf
    • https://cdn.shopify.com/s/files/1/0433/2391/6443/files/capacitor_bank_abb.pdf
    • https://cdn.shopify.com/s/files/1/0435/6630/1343/files/doggy_style_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xezunegudowafosixezuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/60913297406.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/luwipugusupi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007081.bin
fbbe8ec11287537166e944b48e38b54e155a587ee05fdbe90526fd523a21e39f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7081 5552 bytes
font_01_sfnt_off00008343.bin
a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 3204 bytes
font_02_sfnt_off00009036.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9036 2320 bytes
font_03_sfnt_off00009a89.bin
5d008d2984f026af4f2beee799554ba1c05d8e4f642c64062cf88e046c1b0af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A89 10112 bytes
font_04_sfnt_off0000bd14.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD14 16224 bytes

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