Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46ed998a4837f67…

MALICIOUS

PDF

34.6 KB Created: 2020-08-07 22:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1295dc964c32d46f1e5d01d329ee79e SHA-1: a0936581cd803119b1940e93aec60ff08e7a20d2 SHA-256: a46ed998a4837f67fad7e3c9ab64668f94e9019ab8a653efd9274aa41d21caed
152 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by a machine learning classifier. It contains a large number of embedded URLs, many of which point to a link farm hosted on Shopify. One of these URLs, 'https://ttraff.cc/pify?keyword=apostrophe+for+possession+exercises+pdf', is flagged as a known malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of numerous external links suggests a strategy to distribute malicious content or phish users.

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=apostrophe+for+possession+exercises+pdf
    • http://files.downtownwashingtonga.com/uploads/1/3/1/4/131437949/c2a42d3bbd.pdf
    • http://files.realtalkusvi.com/uploads/1/3/1/3/131381021/7773983.pdf
    • http://files.madhatterrestaurantandbakery.com/uploads/1/3/1/8/131871963/girebukaj.pdf
    • http://files.indivisiblecrossville.org/uploads/1/3/0/7/130738991/59b6682.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/53726650300.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/fitafofoboleruxaxozamemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/66140780476.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/john_deere_x_728.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/mifonutigub.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/90044072847.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kixekitigatozodevejale.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/fubajenaxubuxenoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/advanced_race_guide_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0428/6811/3574/files/minecraft_colored_text.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/wow_sinestra_solo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.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_off00004b36.bin
c8385da96d515c6568fd252707ba63cb76d03bc38d0fe2a9ebdc9cecd9698b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B36 5060 bytes
font_01_sfnt_off00005c71.bin
40270df383d19eba60723522c7287c5ede9adb5f0c9bde9c6c0b810628a4ec59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C71 9656 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.