Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecf2663dd0a96cb…

MALICIOUS

PDF

33.4 KB Created: 2020-08-24 11:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85e77a216862d74dda090772540827b0 SHA-1: e7b3729d0cbba49e695b02a93c9268b3d61e6ce2 SHA-256: 7ecf2663dd0a96cbea9511f8fb1c4715b5e9cf03b30e6a205cc2fc74356c03c4
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the string 'Facebook ads manager apkpure' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also exhibits characteristics of a link farm, likely for SEO poisoning or to host a large number of redirectors.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=facebook+ads+manager+apkpure
    • http://files.thebarefootmomma.com/uploads/1/3/1/3/131379820/titilasepot.pdf
    • http://files.mountainkindphotography.com/uploads/1/3/0/7/130738943/wirar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/63789499629.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/schneider_electric_south_africa_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/86765032019.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/tufufejerugofesu.pdf
    • https://cdn.shopify.com/s/files/1/0466/4963/9077/files/hallelujah_chorus_piano_solo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/atrahasis_epic_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/aws_elb_vs_alb_performance.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/badan_beruniform_uitm.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/behavioral_couples_therapy_for_alcoholism_and_drug_abuse.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/zogetapup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/fevuxemexajafute.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/counter_strike_1._6_servers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/69988658965.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/8518304847.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/jalorodojawewejipuga.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_off00004673.bin
d71e6507acada9955e329270c34203f84033f114fc73b06580e9d586b7480df8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4673 5520 bytes
font_01_sfnt_off00005916.bin
757453e8546455a74f8010bf991c6620f315ef63f5fd1c75002668d7fc06cf10
pdf-font-stream PDF embedded font (sfnt) at offset 0x5916 9212 bytes