Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b6069f1a071124…

MALICIOUS

PDF

55.5 KB Created: 2020-08-15 04:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2730587c63b316b2c3ef4bfb9c8a6885 SHA-1: 85fd4f37c0db0b02f935ce40f6c14a1ad5283e74 SHA-256: d1b6069f1a0711245d166639b4ede27121bd196bd35bbde8cb15a330aba10bf9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document also functions as a link farm, embedding numerous links to external PDFs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering through a seemingly relevant document topic.

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=mandatory+reporting+child+care+qld
    • http://files.zoomkidspalakkad.com/uploads/1/3/1/4/131406985/2758958.pdf
    • http://files.harrietlevinmillan.org/uploads/1/3/0/7/130776123/1974364.pdf
    • http://levalu.unifiedtaekwon-do.com/uploads/1/3/1/3/131398455/3400894.pdf
    • http://files.contractorsinmalibu.com/uploads/1/3/0/9/130969532/9e6b75c308a58.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/kid_friendly_anime.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/78945846897.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/96033962753.pdf
    • https://cdn.shopify.com/s/files/1/0445/3964/2015/files/ct_thnh_tng_trang.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/chunkzz_movie_hd_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0986/7929/files/79424826059.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/fobogizumirejutubililaduz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/cours_sur_la_segmentation_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/daboredepazegojil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/litowisagugemexe.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_off00008bff.bin
796d649542a12d3d184ec1ec5574e26dba0d1c31f8167eba16b0fc090b43e6fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFF 5180 bytes
font_01_sfnt_off00009d90.bin
d0d61a2dbd87fbaedfb369bfc0d73b747349b89180e7dd583d2c8bb2bae5a4fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D90 10996 bytes
font_02_sfnt_off0000c2c0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C0 4324 bytes

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