Malicious PDF — malware analysis report

Static analysis result for SHA-256 874dc97b5d19e9f9…

MALICIOUS

PDF

47.8 KB Created: 2020-08-04 04:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d96d5f09e2c8ac4f3325a605e5ff4498 SHA-1: bd50a98d4022a7e65d675efb9f2ae3c5e32653a2 SHA-256: 874dc97b5d19e9f92deb23e35edff8ecf72542900ec5c018a1af623248a8620a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=abraham+maslow+y+su+teoria+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious content. The presence of many Shopify links, some flagged as benign, indicates a link farm technique to obscure the malicious destination. No scripts were extracted from this sample.

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=abraham+maslow+y+su+teoria+pdf
    • http://files.bellabugphotos.com/uploads/1/3/1/4/131406781/8580f0c48a.pdf
    • http://files.gibdevelopments.com/uploads/1/3/1/8/131871622/pudunigutegul_xuwozepeba_nojarew.pdf
    • http://files.asa989.org/uploads/1/3/1/6/131637409/d88aba.pdf
    • http://pipofazi.aquariumsalesandservice.com/uploads/1/3/0/8/130814058/e9758.pdf
    • http://files.littlegiantsbands.org/uploads/1/3/1/3/131380623/6095352.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/gogotumibatale.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/68532956132.pdf
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/55208113323.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/rifoxasopire.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/20810711545.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/22229792161.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/casio_fx-_115es_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/1_99_farming_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/39689630039.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/denelarosakodadokodebakig.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_off000079fc.bin
80d9e98d84af3ce33f0e507babafa3adaad4f9e1bf851df4766c4433553b1423
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 5604 bytes
font_01_sfnt_off00008cf1.bin
7478b89a5c1c059b8227dbeaca2b7cefc8a23203f32ef1f17fb32d4650f0b2e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF1 10988 bytes