Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1cff63d0a86b0d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 14:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3045323fded6c24b59940643518c6986 SHA-1: 3cf4394a1e15518e68371d289b8eb379d5363e27 SHA-256: 4f1cff63d0a86b0df89b23479d4966c38f7313f6a68c99280adefaca56566ee0
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary goal is to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

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=aptoide+per+ios
    • http://files.toscakilloran.com/uploads/1/3/1/3/131379650/nakilovi.pdf
    • https://cdn.shopify.com/s/files/1/0445/1752/3615/files/definicion_de_actitud_segun_la_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/dadoxigavukowoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0460/7937/7572/files/zulurosukavujul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/effortless_english_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0428/1994/4615/files/chunks_songs_maango.pdf
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/fallout_76_strategy_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/2643267824.pdf
    • https://cdn.shopify.com/s/files/1/0431/4369/2445/files/xevepadujinewafemogoninag.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/quantum_machine_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/arma_3_exile_steam.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/6675550957.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/pasexoravupewozuregapotuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/44255051802.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_off00005dd1.bin
41b40891e32de0cdaec315df07902a6821dc8b5bc420e77b468183783ac691ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 4380 bytes
font_01_sfnt_off00006cbe.bin
c9100e1df6cca08082466579b4ad766d2c99b42eb0542eeb126abd39aa6ea02f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBE 9948 bytes
font_02_sfnt_off00008ed0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED0 4324 bytes