Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458b53638657178…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 05:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f34628ec3075aad7b3f8e27882d8eda9 SHA-1: ce5eba51a9a81833007811eb40f77b75ab27a419 SHA-256: 4458b536386571789035f2c59b412cb3b38b0dba3165b6330085566d6d30e41a
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 for a malicious redirector link to 'ttraff.com'. The document body, though partially corrupted, contains text related to 'bridal shower games printable pdf', suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a seemingly innocuous document that redirects to malicious infrastructure.

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=bridal+shower+games+printable+pdf
    • http://files.plug901.com/uploads/1/3/0/8/130813616/2500985.pdf
    • http://wifewowa.drdavidzuniga.com/uploads/1/3/1/4/131453323/tedaxufe.pdf
    • http://files.thesunflowerkids.org/uploads/1/3/0/8/130813366/gegeboperes_vugon_livaduvewaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/noxotowezitipogaruz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soreluseloxajakikolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/convert_pathfinder_to_5e.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/cationic_dyes.pdf
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/54138923032.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/sajesewudedasaliwisigov.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/35299288772.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/rawoborozo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1783/files/xoworilati.pdf
    • https://cdn.shopify.com/s/files/1/0434/9414/6200/files/1679462005.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/302759344.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/45276421179.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/55322959383.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_off00006dcb.bin
719eec23e5027a06357e001ba7df2d4c6515f55667a65c39b67f925ad085e3ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5736 bytes
font_01_sfnt_off0000812e.bin
95d52fd46776293184a53648a46ff87a5483c8556c4e4913ea0726f04bfd6fbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 10072 bytes