Malicious PDF — malware analysis report

Static analysis result for SHA-256 3527986712b63957…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 13:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c93c12d3a6511cac2420507d406b5f83 SHA-1: 60b13a9f4f450b5bdb3216de0084feaf4b0cf05e SHA-256: 3527986712b63957d53f0c784cce0b53c766145fe8c465b97bb7128d35da318b
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This indicates a phishing or social engineering attack aiming to redirect users to 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.cc/pify?keyword=basics+of+stock+market+pdf
    • http://files.veeralohiniva.com/uploads/1/3/2/6/132696274/jugubajexutuzi-javulurovivel.pdf
    • http://files.alexiastevensauthor.com/uploads/1/3/1/6/131606201/suvejafowu_xidowiduna.pdf
    • http://files.mentorpreschools.com/uploads/1/3/1/4/131437246/c819b.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/supafobumene.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/ninojifugoweko.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4178/files/sosojujevev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/java_8_new_features_a_practical_heads_up_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/12895405761.pdf
    • https://cdn.shopify.com/s/files/1/0437/7611/4837/files/faguribot.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/zixitexajozobu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/fazuvajadodijolizilev.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/kabaddi_score_sheet_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/quorum_sensing.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/83754135430.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/23939246576.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_off000061fd.bin
45f27ce629012c67072187e80565b284343fa0cf4486b581196f0714593af35d
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5380 bytes
font_01_sfnt_off00007439.bin
1b19dbbd1cfebe25eca06417924d2747d0f431266c34626342f7a8a01f3f9ba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10276 bytes