Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedec78588b38d4b…

MALICIOUS

PDF

38.5 KB Created: 2020-08-21 19:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3109478ffead48129dc2f3265fdd90b8 SHA-1: 40bb967abd631fe1c77a228b894c5695a9eae89f SHA-256: eedec78588b38d4bbecaa6b844d7c92daa3cc19d14cf080c3f0ed264d6fd0447
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, mentions 'Bunnings warehouse application for a job form', suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to attract traffic, with the primary malicious link redirecting to a potentially harmful site.

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.cc/pify?keyword=bunnings+warehouse+application+for+a+job+form
    • http://temepev.stanalexander.com/uploads/1/3/0/7/130775052/junufulodoz.pdf
    • http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdf
    • http://kesulaw.daragildner.com/uploads/1/3/1/4/131454215/1326a6a18905f53.pdf
    • http://gabarini.blueskyaircraftmarketing.com/uploads/1/3/2/3/132302956/aaef6409.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/william_shakespeare_sonnets_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/prefix_suffix_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/financial_accounting_harrison_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/vosejejemalexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/14297402936.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/rulaxezumiwiwisitov.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2438/files/cement_industry_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/source_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/rupugolorepeloxubigid.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/susik.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7169/files/ahle_hadees_books_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/wordly_wise_3000_book_6_lesson_9.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/82404717831.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_off000056e1.bin
bcae22cbce82b00d2a5a0732e3ada6ad3925903c891ee81a76f853c6b7bc8019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 5784 bytes
font_01_sfnt_off00006a75.bin
81c2ef37d22fc18f66c3f1fdb1c243b7819e23fc9d54f151af474ff8da71dd14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A75 10068 bytes

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