Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b736f69aa6ace8…

MALICIOUS

PDF

51.2 KB Created: 2020-07-24 02:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c4fe2c7e6fc01135709c78db9ca9545 SHA-1: 50020e3bb6c50d52e73d4a037230fe8abb7f0c9c SHA-256: e1b736f69aa6ace8da8cbf2da820f99155ceae6f7013adb691d17aaebf0d02fb
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to a redirector URL. The document body, though heavily obfuscated, contains text related to 'vanilla wow dungeon level guide', suggesting a lure. The primary malicious indicator is the presence of a link to 'ttraff.com', a known malicious redirector.

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=vanilla+wow+dungeon+level+guide
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.pdf
    • http://files.desertjewelsinc.com/uploads/1/3/2/6/132681317/6e489d26b7f.pdf
    • http://files.thegreatalpacaplace.com/uploads/1/3/2/6/132682293/kemosalok.pdf
    • http://files.thegreatalpacaplace.com/uploads/1/3/2/6/132682293/kemosalok.p
    • https://cdn.shopify.com/s/files/1/0437/2529/1671/files/94209755477.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/39057455802.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/binezuwimoparal.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/7723965169.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/32826805393.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/82132696349.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/tamizur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/45296045061.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/zedikebibuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9911/9013/files/5610167920.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/bupubulonurafonesute.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/dewesagobisoxasubalopawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/penewi.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_off00008e60.bin
993e8108a72bf79556507aebb0c156da43b19a9daa0da3c3ce1ccbac72809f50
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E60 4640 bytes
font_01_sfnt_off00009e3f.bin
660d41dd0155f702b411eac346a0b630ab16506c697b5bbac8252b3ffcca529c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3F 9828 bytes