Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9453dd8f4715ef…

MALICIOUS

PDF

50.5 KB Created: 2020-08-24 10:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e130132b21c28ed7a63ba02a99624e8a SHA-1: ed884b0ad32a9f52d31e61b7239ed49dd46e4360 SHA-256: 8b9453dd8f4715efa39405858477e9ceaa5928984e4b0f216fb612e283b03e73
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a job application and the malicious URL. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which is likely used to host or deliver further malicious content.

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=template+cover+letter+for+receptionist+position
    • http://files.eastsideveterinary.com/uploads/1/3/0/9/130969190/gosezapim-ravabateb-vizonipe-fopudipabak.pdf
    • http://files.thelodgeofstgeorge.org/uploads/1/3/0/9/130969623/e64a7c2785b7dc.pdf
    • http://files.ziongale.com/uploads/1/3/1/3/131379420/9028893.pdf
    • http://moroxuje.royalhouseofstyle.com/uploads/1/3/0/9/130968931/zumadanuximos.pdf
    • http://files.gamain.gaflint.org/uploads/1/3/0/8/130874102/6496696.pdf
    • http://files.eastsideveterinary.com/uploads/1/3/0/9/130969190/gos
    • https://cdn.shopify.com/s/files/1/0439/1396/9819/files/203256303.pdf
    • https://cdn.shopify.com/s/files/1/0437/7097/0263/files/70381217753.pdf
    • https://cdn.shopify.com/s/files/1/0435/8602/7677/files/convex_concave_polygon_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/vodewotubumodagesegikatup.pdf
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/95148291565.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2785/files/xasemesubaworewes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7827/8550/files/arcane_legends_mod_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0431/1908/3677/files/ma5156_applied_mathematics_for_engineers_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/2718/4281/files/mezofepixubipoliropa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/brain_out_level_115_answers.pdf
    • https://cdn.shopify.com/s/files/1/0464/6132/1384/files/woxojasugivupapuweb.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_off00007801.bin
7cc5f6d3ce626af0abe6ccb0fdc6f15968300b49de7d76f5c62425265306c3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7801 4956 bytes
font_01_sfnt_off000088c2.bin
abcfea48d3b1d0f0e32ec08dac0392e7f2a8e55c2589c6ff296a9e5b2ff96235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C2 10968 bytes
font_02_sfnt_off0000ae3a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE3A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.