Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbba2858e8d79cb…

MALICIOUS

PDF

37.4 KB Created: 2020-08-24 23:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd2a673701e860ea1444c9ed27ba26e SHA-1: 5b7be296bf1868abda86647b6d5172568e60323f SHA-256: 1dbba2858e8d79cbe2489efb19fb4550598e3d63aad0838f4ca87260d2bc91f8
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a PDF link farm. The document body contains numerous embedded URLs, including one pointing to `ttraff.com`, which is identified as a malicious redirector. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com` and other domains, suggests an attempt to create a link farm or distribute further malicious content. No scripts were extracted, but the sheer volume of links and the critical heuristic firings strongly indicate a malicious intent, likely for SEO manipulation or malware distribution.

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=dihybrid+punnett+square+worksheet+two+factor+crosses
    • http://mopekajum.tcfastpitchchampionships.com/uploads/1/3/2/8/132814930/fb33d0cd36f7a.pdf
    • http://files.lonemami.com/uploads/1/3/1/1/131164097/30410226.pdf
    • http://vareb.aspen-industries.com/uploads/1/3/0/7/130775075/9513256.pdf
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/xesipexujupagafofi.pdf
    • https://cdn.shopify.com/s/files/1/0457/3636/2140/files/51391319259.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6039/files/8778302732.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/sofivibinijedaxanotije.pdf
    • https://cdn.shopify.com/s/files/1/0438/2641/3725/files/bubble_trouble_3_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/montana_of_300_try_me_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/xikirokexawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6172/files/5025846744.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/kabewejifefipowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4968/files/golf_range_exploration_sheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/fimodofirezel.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_off000050b2.bin
d64f2f727df81ab0cb954e46153e4bbcc04efb18e5d4ad7f27d7dd7007c6e0eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B2 5732 bytes
font_01_sfnt_off0000643a.bin
e4487bb944f7f914ae66cb2b13c61287359036855dc7bbde3f819410779718e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 10660 bytes

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