Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bc0b9b6cad1d88…

MALICIOUS

PDF

42.4 KB Created: 2020-08-18 17:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e239a11c740c66c2dc42a30a0ad4cd3a SHA-1: 810f27d44d26b81d7045e147108e1904a7f3b78d SHA-256: b8bc0b9b6cad1d887543f742a35a045596a9d166f29c2cac9f77d1520fda364f
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including a critical redirector link to 'ttraff.com' which is associated with malicious activity. The document body, though heavily obfuscated, contains text related to 'neumonia tratamiento pdf', suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for 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.com/pify?keyword=neumonia+tratamiento+pdf
    • http://komowine.seaspalife.com/uploads/1/3/2/7/132712323/44cced.pdf
    • http://kepolid.stuffrobpaints.com/uploads/1/3/1/3/131380213/xirubexaw-feribode-tajogapaduru.pdf
    • http://files.stickandstringtv.com/uploads/1/3/1/0/131070144/xolugiwenal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/35481506884.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/56919342798.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/drowned_city_of_skalla.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/kafakumibexazul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/fofifuzunupevawirapikiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/51192356002.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/8104826601.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/99256444481.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/smoking_girl_hd_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/alter_ego_a2_gratuit_avec_cd_audio_mp3_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/organic_chemistry_klein.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://medlineplus.gov/spanish/pneumonia.html
    • 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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006656.bin
117e03c8e89e8ec932d32c66af89b19d3ba47d968400366b9943b37515845522
pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 4948 bytes
font_01_sfnt_off00007714.bin
8b541a6c6b43142a2dea1a853a7e89812e7ca9459a8ad999d078c0789ba33f5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 11128 bytes