Malicious PDF — malware analysis report

Static analysis result for SHA-256 97896d175bf2f1c1…

MALICIOUS

PDF

49.1 KB Created: 2020-08-21 05:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 117b4b454c3550b91fd5676239903b81 SHA-1: 9895a213e070014ca1d0fd2ed9a4cdf945296565 SHA-256: 97896d175bf2f1c1e6c0d1077a0845281be5469429635e6c6037da3ac6fdc031
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains numerous embedded links, many pointing to PDF files hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=que+color+forma+el+verde+y+amarillo'. The presence of a large number of external PDF links suggests a link farm, potentially for SEO manipulation or to distribute further 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=que+color+forma+el+verde+y+amarillo
    • http://files.emmaharry.com/uploads/1/3/2/7/132741334/gevobu.pdf
    • http://files.flipboatmallorca.com/uploads/1/3/2/7/132710678/55ffc0a5c803.pdf
    • http://biwog.jlsvalves.com/uploads/1/3/1/1/131163559/xafalubimoxag-poredediweduro-kizawubidopevut-kunifum.pdf
    • http://nezinolib.sparklingimagedesigns.com/uploads/1/3/1/3/131380600/rumow-kujurinepizeg-kasobutedifuza-fenagu.pdf
    • http://files.quoderatdemo.com/uploads/1/3/2/6/132681863/jovinujeb_magovovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/fevikolunidowasotuziw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/pall_wall_oh_girl.pdf
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/xovozemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/watimagubuzad.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/cae_writing_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/folawedusifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/kokenaxazeni.pdf
    • https://cdn.shopify.com/s/files/1/0431/0787/7017/files/schindler_s_list_theme_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/madukaziludima.pdf
    • https://cdn.shopify.com/s/files/1/0451/7858/5239/files/zelda_ocarina_of_time_64_rom.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_off00006b80.bin
09d1a3aae9dec1d0cb517fc0b16f8c9f64cbbd01f8903161f54c14e99a96cce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 5212 bytes
font_01_sfnt_off00007d2f.bin
d4a4781fe7d9f64e3350be8309c004bc3ad46f0fecc10735fc5feb572cfb3fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2F 10852 bytes
font_02_sfnt_off0000a0ea.bin
9352d416d3fc38e0cde715a6fbdb9492e961298b7af78ef2a950ce7bf6ec641e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EA 16076 bytes

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