Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d18393b407197be…

MALICIOUS

PDF

47.5 KB Created: 2020-08-18 19:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76d17072107dac58e1247b540e88f882 SHA-1: ba70967cd1973ce2d2d2aafaff08cc18f931e503 SHA-256: 8d18393b407197bedf04b2c4936f94b0fed30df6dd1e832346e353f436a502a0
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=mcgraw+hill+connect+algebra+1+answers`. This indicates the document's primary purpose is to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'mcgraw hill connect algebra 1 answers' and numerous embedded URLs, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic to attract victims. The presence of a malicious redirector URL is the highest priority IOC.

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=mcgraw+hill+connect+algebra+1+answers
    • http://files.drgaranzuay.com/uploads/1/3/0/7/130738836/kusifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/amplitude_shift_keying_using_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/65832067566.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/marcha_antalgica.pdf
    • https://cdn.shopify.com/s/files/1/0434/4833/6536/files/bella_y_bestia_rachel_bels.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/nijiniremobidejuzopur.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/sonepuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/mezasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3863/files/vinunatadapalesonebidupik.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/clinical_nutrition_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/vijuxojugifajumevas.pdf
    • https://cdn.shopify.com/s/files/1/0436/0005/2387/files/warhammer_total_war_bretonnia_army_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/55918094591.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/88292714665.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/projection_matrix_formula.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_off000073f0.bin
583b260d447e89ad08a5cd30aac879b3431a730c68225e52195a4889131b825a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 5352 bytes
font_01_sfnt_off00008638.bin
9fba15afb17a010d96992d65b55ec94afc1e3d8aac6795b72e4128a4934a3446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8638 13396 bytes

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