Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27930dca9d6d0a9…

MALICIOUS

PDF

53.3 KB Created: 2020-08-18 14:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce9543fb87ece93118d26936e3ddbed7 SHA-1: 37045ea83f8a68ede30be7648fc1f2567acd29ac SHA-256: c27930dca9d6d0a963f0048b0a6b52a09a3ab2f661c2f02b468fd3c4dc9d9da3
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=aala+re+aala+song++bestwap, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted links, suggesting a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aala+re+aala+song++bestwap
    • http://files.dillsplace.com/uploads/1/3/1/3/131383727/2009745.pdf
    • http://files.theresponsiblecapitalist.com/uploads/1/3/1/4/131453615/56fc8690.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/fe_civil_practice_exam_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6467/files/mejewipux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/pexaxuwexamupogikifoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/gatineau_park_winter_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/rivefamijaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/84957306550.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3695/files/bolawavekiwaluwuwezuzu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/ptolemy_geography_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0443/3759/4524/files/57196431553.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/12735791252.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/masodinafiminuniwololode.pdf
    • https://cdn.shopify.com/s/files/1/0435/3451/6376/files/78764648728.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b99.bin
8809de2f60dc39d95b85578463857069e97fed4904bde6ef0f33af56de5d8c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 5208 bytes
font_01_sfnt_off00007d70.bin
bdebad870e261d2beced9a025be3c68254257ffb120071466ed5cb1ea45745de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 16400 bytes
font_02_sfnt_off0000b060.bin
952a5dadc03f7d2400e70970f7348b50f8356ce787130af7de6dee622740d064		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB060 7168 bytes

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